Timepiece



G. JACOT TIMEPIECE Jan. 13, 1931.

Filed Feb. 10, 1950 INVENTORI Q Ja a W W AZTORNEY Patented Jan. 13, 1931g 4 UNITED STATES enonens mcor, or GENE A, SWITZERLAND, ASSIGNOR TBULOVA WATCH COMPANY, 1

PATENT OFFICE INC., OF NEW YORK, N. Y.

v TIMEPIEGE Application filed February 10,1930, Serial No.

This invention relates to a timepiece wherein the mainspring isreenergized by means of a winding mechanism including an oscillatingmass and its object is the provision of simple and reliable meanswhereby the oscillations of the mass are made ineffective when themainspring is fully energized.

In the accompanying drawing, illustrating an embodiment of theinvention,

Figure 1 is a plan view of the winding mechanism of the timepiece,

Figure 2 is a section taken on the line II-II of Figure 1. r

In Figure 1, 1 indicates the movement of the timepiece and 2 a-circulargroove along which the mass 3 is adapted to oscillate. This mass isfixed on or integral-withan arm at. A toothed sector 6 is rotatablymounted on the shaft 7' of a ratchet wheel 8 and is adapted to be movedby a pinion 9 which is mounted on the arm l. A pawl 10 is supported onthe sector 6 by means of a screw 11 so as to slide along an are shapedslot 12 provided on the sector. The pawl 10 cooperates with the teeth ofthe ratchet wheel 8 and is normally held at the upper end of the slot 12by means of a spring 13 mounted on the sector 6. A second spring 1-1maintains the pawl 10 in constant engagement with the teeth of the,ratchet wheel. The pinion 15 is mounted on the ratchet wheel and isgearedto the spring drum 16 by means of the two wheels 17.

The operation of the described mechanism is the following. a When themass 3 swings in the direction of the arrow f, the pinion 9, turning inthe same direction, drives the sector 6 in the direction of-the arrow 7.The pawl 10 is held in its position at the upper end of the slot 12bymeans of the spring 13 and acts upon the ratchet wheel 8 which winds thespring drum by the intermediary of the wheels 15 and 17.v

Then the mass swings in the direction opposite to the arrow 7, thesector 6 swings downwardly as seen in Figure 1 and the pawl 10 slidesover the teeth of the ratchet wheel without turning the latter.

When the spring drum is wound up tight 427,301, and in SwitzerlandJanuary 8, 1930.

the ratchet wheel is unable to turn and the Y the ratchet wheel andadapted to be moved by the oscillations of said mass, a, supportingmember slidably engaging the pawl, and spring means interposed betweenthe pawl and the supporting member, the tension of said means being suchthat normally the pawl is prevented to slide relative to its supportingmember, but when said mainspring is wound up the pawl can slide relativeto the supporting member against the action of said spring means.

mainspring winding timepiece mechanism comprising an oscillating mass, 7

a ratchet wheel operatively' connected with the mainspring, a toothedsector mounted on the axis of said ratchet wheel and adapted to beturned thereabout by the oscillationsof said mass, said sector beingprovided with an are shaped slot, a pawl mounted on said sector inslidable engagement with said slot, and spring means interposed betweensaid sector and said pawl and normally holding the pawl at one end ofthe slot, but when the nainspring is wound up permitting a slidingmovement of the pawl relative to the sector.

In testimony ture.

GEORGES J AGOT.

whereof I afiiX my signa-

